Well what character do you want to portray? It would be useful to post a reference picture. You might want to try and check out the commissions forums to see if there are anyone in Montreal that can do it.

Instead of a Tailor try looking for a dressmaker they might be able to help you, since their end of clothing is more varied. You can also go into an alteration shop and ask the employees if anyone of them is willing to sew something for you outside of their workplace.

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Lassparri: "They threw an apple at me!"
Groucho: "Well, watermelons are out of season."